Shopkeepers have been warned that there is likely to be a flood of underage drinkers attempting to buy booze tomorrow

The survey of 1,000 GCSE students also found that 15 per cent will ask their parents to buy drinks for them, a third are planning to buy the booze themselves while one in ten will use a fake ID.

And while some teenagers might see having a tipple or two to celebrate their grades as a one-off occasion, the research revealed that underage drinking is an issue all year round.

Results showed more than a quarter (26 per cent) drink alcohol at least once a month and 13 per cent drink at least once a week.

The teenagers questioned admitted to getting themselves into precarious situations when under the influence of alcohol.

A fifth have argued with family of friends, 15 per cent have found themselves injured, admitted to hospital or blacked out, and one in 10 confessed to having sex.

A further five per cent have engaged in physical violence and four per cent admitted to taking drugs, while one in 20 women admitted to self-harming after drinking.

Tony Allen, managing director of Under Age Sales who commissioned the survey, said: "It's an exciting time for teenagers receiving their exam results, and many will see this as the perfect opportunity to celebrate their hard work and let their hair down with a drink.

RELATED STORIES

What next?

Missed out on the GCSE grades you needed? Here are some other options apart from sixth form or college

Exam plan!

When is GCSE results day 2016? Everything you need to know including what to do if you don’t get expected grades

TEEN DREAM

Ryan Sessegnon, 16, scores just ONE minute after coming on for Fulham... and doesn't pick his GCSE results up…

'HE'D HAVE DONE BETTER AT a LOCAL COMP!'

Lorry driver sues £28k-a-year school after son left with just ONE GCSE

genital knowledge

Do you know more about sex than a GCSE student? Take this quiz to find out

"While some parents may allow this to happen in the safety of their own home where their children can be supervised, it's important to remember that there are laws in place to protect youngsters and their local communities from harm and anti-social behaviour.

"As potentially thousands of teens will aim to purchase alcohol, it's more important than ever for retailers to adhere to the law and be extra vigilant when it comes to implementing age verification policies.

"Retailers need to make sure their staff are fully trained so they understand the law and how to comply with it, as well as initiatives like Challenge 25.